Vorrichtung zum Erkennen und Korrigieren von Fehlstellen in Holz

DEVICE FOR RECOGNIZING AND CORRECTING DEFECTS IN WOOD

TECHNICAL AREA

The invention concerns a device for recognizing and correcting defects in wood with defects a recognizing and - measuring sensor, with a conveyer system for the wood which can be examined and with any defects repairing tools, which are shiftable computer controlled along at least two, preferably three, axles concerning the promoter surface with feed motions.

STATE OF THE ART

One would genericin accordance with-eat device is for example from the EP 239,143 a2 well-known, which recognizes the defects with a sensor, which can be repaired, that usually from Mehrbzw. Multiplicity to the sensor interconnected sensor units exists on. Thus the situation of the defects at the wood can be determined, in particular at wooden plates or slats and/or slow-acting one clearly. Subsequently, the product in fixed clock thrusts and distances is transmitted to one or more work stations, in which the necessary patching up are accomplished. In addition a wood which can be repaired is shifted with the conveyer system to a repair tool, continued there and supplied afterwards the defect with the repair tool, according to which the appropriate wood is further-promoted if necessary up to the next defect or work station. For this purpose can be intended along the conveyor several such tools, one separate drive each is assigned to which.

Another device for repairing defects in wood (DE 102 23 831 A1) covers arranged tools, which are shiftable arranged transverse to the promotion direction of the wood on a portal. This device needs however a not insignificant number of portals, which increases the overall length of the device in unwanted mass. A board in a certain place to work on during it a continuous feed motion is subject is for example from the EP 2,006,060 A1 well-known.

Besides defects can be recognized and repaired also manually, what does not count itself for a mass production however. A substantial disadvantage of this well-known device is in the fact that the wood must be always stopped for working on and according to is enough conveyer systems to be planned is, if several working on mechanisms are one behind the other arranged in feed direction.

REPRESENTATION OF THE INVENTION

On the basis of conditions of the technology of the before-described kind the invention the task is the basis to create a device for recognizing and correcting defects in wood with in relation to the conditions of the technology of shortened overall length a increased throughput at and correcting defects which can be recognized made possible.

The invention solves this task thereby that a control is intended, which the feed motions of the tools heads for and on a feed motion of the conveyer system up-synchronizes a substantial advantage of the invention lies in the fact that the conveyer system does not have to be stopped for repairing the respective defect any longer, whereby the throughput of the device increases substantially. Can be only necessary, feed speed to a defect arrangement to adapt - large and/or - number.

In accordance with a variant of the invention it can be intended the fact that the tools on at least one portal are shiftable, whereby at least at the portal transverse to the promotion direction of shiftable guidance carriers is assigned to each portal, along whose guidance aligned in promotion direction a tool carriage are shiftable.

Are besides at least two guidance carriers for each portal intended, then problem-free two can, or also when planning several guidance carriers if necessary in promotion direction arranged, Holzstücken to each other shifts several defects, which in particular at a Holzstück or at several beside-in-and-suppl.-lined up, to arise, without stopping the conveyer system be supplied.

A further relevant improvement results, if two transverse guidance for guidance carriers are assigned to the portal, whereby a transverse guidance at least one against the promotion direction and the other transverse guidance abragenden at least one in the promotion direction of the portal guidance carriers enclosure. Thus for example two groups at tools can be planned in promotion direction, which are shiftable along the transverse guidance for itself. With an increase of the number of tools, possible in this way, for example different kinds and colors at repair materials with a device can be equally used. This in particular if for each transverse guidance at least two several guidance carriers are intended preferably. Thus for example darken and brighten defects in the wood can equally in favourable way with appropriate repair means to be treated.

The invention is the basis the substantial advantage that a such device needs in relation to the conditions of the technology less building area, in particular a substantial shorter overall length exhibits, since the processing units are arranged at a portal both in series and parallel to each other and if necessary even all tools can at the same time work on a workpiece. A tool covers for example a mechanical processing unit, peg setting unit, repairing setting unit od. such and/or a metering unit, a mixture unit or a repair unit for a hardening mass.

Repairing the defects takes place in the run, thus in particular without stopping the conveyer system, whereby the processing units are equipped transverse to the conveyer system in and with at least two degrees of freedom. The fact that the tool besides be perpendicularly against the promoter surface employable can, understands itself automatically.

A procedure for the operation of a device according to invention, with which the defects by woods resting upon a longitudinal promoter first of a sensor recognized, presumptuously and the data become buffered, according to which the defects with a tool subordinate in promotion direction the sensor are repaired are characterised by the fact that the measuring data that are adjusted by the sensor taken up defects also in the memory stored measuring data, in particular reference data, and by the alignment the quantity necessary for repairing are calculated and to the taken up measuring data assigned and that repairing the defects during current conveyer system taken place and the tool is shifted for repairing a respective defect opposite the moved defect.

In order to keep thereby the employment as small as possible by repair materials, the measuring data of the defects taken up by the sensor are adjusted also in the memory stored measuring data, in particular reference data, and calculated by the alignment the minimum quantity necessary for repairing the respective defect and assigned to the taken up measuring data. This system is to be implemented in particular separately, whereby, for example after additional measuring of the defect after working on and a comparison before and after the repair taken up data, any corrections in the reference data are added automatically or manually to be made to be able and/or new reference data.

By this measure the working on speed can be improved substantially. Besides thereby the conveying speed of the conveyer system can be stopped in dependence of the number of defects which can be repaired and the number of existing tools in the sense of an achievement of a maximum mechanical handling capacity.

Since as high a production speed as possible is to be achieved, it recommends, if for the taken up measuring data in dependence of the respective situation and the calculated quantity necessary for repairing the respective defect and the repair time necessary for it that combination at processing sequence is selected, with which a maximum conveyer system feed speed obtains itself. The computer varied thereby in particular all possible working on sequences of the defects presumptuous taken up by the sensor and selects that one, with which the largest feed speed can be obtained, which of an appropriate control is then given. To the fact it is necessary that the arithmetic and logic unit knows not only all data and/or situations of defects, but also the tools.

Favourable conditions result, if the sensor recognizes the color the defect of surrounding material, which computer determines and in the memory of the defect assigns the color of an available wadding, according to which for repairing a tool with a suitable repair material color is assigned to the defect and considered with the computation of the feed speed.

For the invention it is substantial that the woods in motion are worked on and feed speed during this treatment are in such a manner variable adjusted and/or selected that as large a throughput as possible is obtained. In addition a computer unit evaluates the sensor data and the data from error recognition as well as if necessary additional data of an operator with algorithms in such a manner that evenly this maximum mechanical handling capacity is reached. With the invention it is to be worked on possible a variety at products and Produktvarianten equally in a device, without having to accept substantial Umrüstzeiten of the device. With the invention besides process security is increased, whereby by appropriate algorithms the optimal dosing quantity, which is calculated in such a way optimal operating speed of the processing units as well as the working on sequence and the allocation of the necessary work on the individual processing units that the feed speed of the product which can be worked on becomes maximum.

SHORT DESCRIPTION OF THE DESIGNS

In the design the invention is schematically represented on the basis a remark example. Fig show. 1 Fig. 2 Fig. 3 Fig. 4 Fig.

a device according to invention in diagonal view, the device from Fig. 1 in plan view, the device from Fig. 1 and 2 in side view, the device from Fig. 1 to 3 in front view and an operation diagramme of a plant according to invention.

AWAY FOR THE EXECUTION OF THE INVENTION

A device for recognizing and correcting defects in wood covers defects a recognizing and measuring sensor 1 the one conveyor 2 is just as assigned, as several repair tools 3 a basic portal 4, which spans the conveyor 2. The wood, in the represented remark example wood slats 5, which can be examined, rest upon the promoter surface 6 and with the conveyor 2 first by the scanner 1 are shifted and closing to the working on tools 3 on supplied. The individual working on tools 3 are computer controlled along at least two, preferably three, axles shiftable concerning the promotion surface 6 with feed motions.

In order on the one hand several defects at the same time to repair to be able without on the other hand the conveyor 2 for repairing the defects 2 to continue to have, the tools 3 portal 4 spanning on the conveyer system 2 transverse to the promotion direction 7 are arranged, whereby several guidance carriers 8 shiftable transverse to the promotion direction 7 are assigned to the portal 4, along whose 7 guidance 9 one tool carriage each 10 aligned in promotion direction are shiftable. Thus it is ensured that the wood 5 is accomplished during it under feed motion under the portal 4 with the repair tools 3 be worked on can, whereby the tool is following shiftable 3 along the guidance 9 and the portal guidance 1 1 of a defect. The moreover one 4 two transverse guidance 1 1 for guidance carrier 8 are intended at the portal, whereby a transverse guidance covers 1 1 three against the promotion direction 7 and the other transverse guidance 1 1 of three 4 guidance carriers 8 abragende in the promotion direction 7 of the portal.

For repairing any defects the woods 5 are shifted by the sensor 1, these recognize defects and store the appropriate defect data and defect situations into a data memory, according to which the defects with a tool 3 during current conveyer system 2 subordinate in promotion direction the sensor are repaired.

In addition the tool 3 with the feed motion is shifted opposite the respective defect.

The sensor 1 writes its data into the memory of an arithmetic and logic unit 13, which from the taken up measuring data of the defective equipment and their respective situation as well as the calculated, for repairing the respective defects necessary quantities and the repair times a combination of a processing sequence necessary for it selects, with which a maximum conveyer system feed speed is obtained. The computer 13 heads for the order header of repair material dosing equipment over a control unit 14 for example, thus the tool 3. The moreover one a control 15 results in feed speed 11 for the transverse feed motions of the guidance carriers 8 forwards. In a module 16 takes place the determination of the respective fastest working on sequence for the defects, which is put down together with the control data for feed motions and promoter speed into the memory 17 of a virtual feed axle. Equally a control 18 is intended, which heads for the feed motion 19 that the individual guidance 9 assigned tool tools 1 0. These data adjusted on the feed motion of the conveyor 2 up-to 20 and finally with the data 17 and accordingly headed for the conveyer system 2.

Austrian patent office